ASME B18.31.5 Round Bend U Bolts

ASME B18.31.5 Round Bend U Bolts

ASME B18.31.5 Round Bend U Bolts

Dimensions of ASME B18.31.5 Round Bend U Bolts

Pin Fields Diameter D, and UNC Thread Inside Length, L Inside Width, C Thread Length, T Nominal Pipe Size
3,D 5, LCT Basic Max Min Basic Max Min Max Min
04 012 1/4 - 20 1.250 1.280 1.220 0.563 0.593 0.533 0.810 0.690 1/4
04 013 1/4 - 20 1.250 1.280 1.220 0.750 0.780 0.720 0.685 0.565 3/8
04 022 1/4 - 20 2.250 2.280 2.220 0.750 0.780 0.720 1.560 1.440 3/8
04 017 1/4 - 20 1.750 1.780 1.720 1.000 1.030 0.970 1.060 0.940 1/2
04 020 1/4 - 20 2.000 2.030 1.970 1.000 1.030 0.970 1.060 0.940 3/4
04 031 1/4 - 20 3.125 3.155 3.095 1.000 1.155 0.970 1.560 1.440 3/4
04 023 1/4 - 20 2.250 2.280 2.220 1.125 1.155 1.095 1.310 1.190 3/4
04 027 1/4 - 20 2.750 2.780 2.720 1.125 1.155 1.095 1.435 1.315 1
04 034 1/4 - 20 3.438 3.468 3.408 1.125 1.280 1.095 2.435 2.315 1
04 030 1/4 - 20 3.000 3.030 2.970 1.250 1.280 1.220 1.435 1.315 1 1/4
04 032 1/4 - 20 3.250 3.280 3.220 1.250 1.405 1.220 1.435 1.315 1 1/2
05 021 5/16 - 18 2.188 2.218 2.158 1.375 1.405 1.345 1.435 1.315 1/2
05 0222 5/16 - 18 2.188 2.218 2.158 1.375 1.530 1.345 1.060 0.940 3/4
05 023 5/16 - 18 2.188 2.218 2.158 1.500 1.530 1.470 1.060 0.940 1
05 026 5/16 - 18 2.688 2.718 2.658 1.500 1.780 1.470 1.185 1.065 1 1/4
05 045 5/16 - 18 4.500 4.530 4.470 1.750 1.780 1.720 2.060 1.940 1 1/4
05 027 5/16 - 18 2.688 2.718 2.658 1.750 1.780 1.720 1.060 0.940 1 1/2
05 047 5/16 - 18 4.750 4.780 4.720 1.750 1.780 1.720 3.060 2.940 1 1/2
05 032 5/16 - 18 3.188 3.218 3.158 1.750 2.030 1.720 1.060 0.940 2
05 056 5/16 - 18 5.625 5.685 5.565 2.000 2.030 1.970 3.060 2.940 2
05 037 5/16 - 18 3.688 3.718 3.658 2.000 2.030 1.970 1.060 0.940 2 1/2
06 022 3/8 - 16 2.250 2.280 2.220 2.000 2.030 1.970 1.310 1.190 1/2
06 023 3/8 - 16 2.250 2.280 2.220 2.000 2.030 1.970 1.310 1.190 3/4
06 025 3/8 - 16 2.500 2.530 2.470 2.500 2.530 2.470 1.310 1.190 1
06 027 3/8 - 16 2.750 2.780 2.720 2.500 2.530 2.470 1.185 1.065 1 1/4
06 026 3/8 - 16 2.625 2.655 2.595 2.500 2.530 2.470 1.310 1.190 1 1/2
06 031 3/8 - 16 3.125 3.155 3.095 3.000 3.030 2.970 1.310 1.190 2
06 036 3/8 - 16 3.625 3.655 3.595 3.000 3.030 2.970 1.310 1.190 2 1/2
06 066 3/8 - 16 6.625 6.685 6.565 3.000 3.030 2.970 3.060 2.940 2 1/2
06 041 3/8 - 16 4.125 4.155 4.095 3.000 3.030 2.970 1.310 1.190 3
06 055 3/8 - 16 5.500 5.560 5.440 3.500 3.530 3.470 2.310 2.190 3 1/2
08 045 1/2 - 13 4.500 4.530 4.470 3.500 3.530 3.470 1.685 1.565 2 1/2
08 050 1/2 - 13 5.000 5.060 4.940 3.500 3.530 3.470 1.560 1.440 3
08 085 1/2 - 13 8.500 8.590 8.410 4.000 4.030 3.970 3.060 2.940 3
08 055 1/2 - 13 5.500 5.560 5.440 4.000 4.030 3.970 1.560 1.440 3 1/2
08 060 1/2 - 13 6.000 6.060 5.940 4.500 4.530 4.470 1.560 1.440 4
08 072 1/2 - 13 7.250 7.310 7.190 5.625 5.685 5.565 2.060 1.940 5
08 084 1/2 - 13 8.375 8.465 8.285 6.750 6.810 6.690 2.060 1.940 6
08 104 1/2 - 13 10.375 10.465 10.285 8.750 8.840 8.930 2.060 1.940 8
12 138 3/4 - 10 13.813 13.933 13.693 10.875 10.965 11.055 4.060 3.940 10
14 161 7/8 - 9 16.063 16.183 15.943 12.875 12.995 12.755 4.310 4.190 12
14 173 7/8 - 9 17.313 17.433 17.193 14.125 14.245 14.005 4.310 4.190 14
14 193 7/8 - 9 19.313 19.193 19.193 16.125 16.245 16.005 4.310 4.190 16
16 217 1 - 8 21.688 21.568 21.568 18.125 18.245 18.005 4.810 4.690 18

Notes :
UNC Threads are standards for low strength materials, but UNF threads are usually available on special order.
Dimension C should be measured at point 1/2L from the threaded end.

ASTM A193 Grade B8C Fastener Coatings

PTFE Coated B8C Fasteners
PTFE Coated
Black Phosphated B8C Fasteners
Black Phosphated
Zinc Plated B8C Fasteners
Zinc Plated
Hot Dip Galvanized B8C Fasteners
Hot Dip Galvanized
Cadium Plated B8C Fasteners
Cadium Plated
Ceramic Coated B8C Fasteners
Ceramic Coated
Zinc Nickel B8C Fasteners
Zinc Nickel
Zinc Flake Coated B8C Fasteners
Zinc Flake Coated